Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D286894 | Combined writing board and pen | David J. Haas | 1986-11-25 |
| 4605246 | Writing board | David J. Haas | 1986-08-12 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D286894 | Combined writing board and pen | David J. Haas | 1986-11-25 |
| 4605246 | Writing board | David J. Haas | 1986-08-12 |